Nope, different. Quite a bit smaller. The regulator to the rail is the same.If I remember correctly, same size as the fuel injector, too.
2-18416 is the Napa fuel line O-ring set part number.
There are 2 different sized o rings in the package i just picked up, the smaller one goes on the line that threads into the bottom of the regulator, where does the larger one go? Regulator to fuel rail?
It's in my post above. If you're talking about the -rail- to the regulator it's the same as an inj o-ring.
I know this sounds stupid but do i just go to the dealer and ask for an injector o ring for a 1993 Typhoon?
Doing some research I found this: Be sure to double check.
HTH
GM 22516256 O ring -- Fuel return line
GM 22514722 O ring -- Fuel feed line